Our 1/8 ounce smell proof bags come with an expandable gusset, tear notch, heat seal area, and a resealable zipper. Bags will stand up on their own once gust is expanded. Smell proof bags are a great option to keep moisture out and lock in the freshness. Depending on density, our 1/8 ounce smell proof bags with expandable gusset, can fit up to 4 grams.